Inference Questions
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Inference Questions — Key Facts for LSAT India Core concept: Inference questions ask what MUST be true, CAN be true, or CANNOT be true based solely on the passage High-yield point: You are NOT adding your own opinion — you are extracting what the passage logically entails ⚡ Exam tip: Answers that require outside knowledge or go beyond what the passage supports are always wrong
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Inference Questions — LSAT India Study Guide
What Is an LSAT Inference?
An inference on the LSAT is not a guess, a personal opinion, or a logical leap. It is a statement that must be true if the passage is true. Think of it this way: if you accepted every claim in the passage as true, could you also accept this answer choice as true? If yes, it is a valid inference. If the answer choice adds new information, makes a stronger claim than the passage warrants, or requires outside knowledge, it is invalid.
This distinction is crucial. LSAT inference questions test your ability to follow the logic of an argument to its necessary conclusion — not your ability to speculate creatively.
Three Flavors of Inference Questions
LSAT India tests three distinct types of inference questions. Each has its own logic and its own elimination rules.
1. Must Be True (Most Common)
These questions ask: “Which of the following must be true based on the passage?” The correct answer is the only choice that is guaranteed by the passage. If any other answer choice could be false without contradicting the passage, it is wrong.
Key test: Could this answer be false while the passage remains completely true? If yes, it is not a must-be-true.
Sample question stem:
- “If the information in the passage is correct, which of the following must be true?”
- “It can be inferred from the passage that…”
- “The passage most strongly supports which of the following conclusions?“
2. Most Strongly Supported
These questions are slightly softer than Must Be True. They ask for the answer choice that has the best support in the passage — even if it is not a logical certainty. When you see “most strongly supported,” you have more room to work with, but the answer must still be grounded in the passage text.
Key test: Among all answer choices, which one has the most direct and compelling support from the passage?
Sample question stem:
- “Which of the following is most strongly supported by the passage?”
- “The passage provides the strongest support for which of the following?“
3. Cannot Be True (Least Common, Often Hardest)
These questions ask: “Which of the following cannot possibly be true, given the passage?” You must eliminate every answer choice that could be true and find the one that definitively contradicts the passage.
Key test: Find the answer that conflicts with the passage — not the one that is merely unlikely or unestablished.
Sample question stem:
- “Which of the following cannot be true based on the passage?”
- “Which of the following statements is most clearly contradicted by the passage?”
A Worked Example
Passage:
“Historians of ancient Athens have traditionally argued that the practice of ostracism — the public exile of citizens deemed dangerous to the state — was a cornerstone of democratic governance. Under this view, ostracism served as a safety valve that prevented the accumulation of excessive political power. However, a revisionist school of thought contends that ostracism was rarely invoked for its stated democratic purpose. Examining the historical record, these scholars note that of the roughly 11,000 ostracism votes recorded between 487 and 417 BCE, only 19 resulted in actual exile. They argue that the procedure was more a ritualized display of democratic ideology than an effective institutional mechanism.”
Question: “It can be inferred from the passage that the author would most likely agree with which of the following statements?”
Evaluating answer choices:
(A) “Ostracism was the most important democratic institution in ancient Athens.” No support. The passage never ranks institutions by importance.
(B) “The revisionist interpretation challenges the traditional view of ostracism.” Yes — this is directly supported. The passage explicitly contrasts the revisionist school with the traditional view, noting that the former challenges the latter.
(C) “The rarity of actual exile proves that ostracism had no political effect.” No — the passage does not go this far. It says the revisionists argue this, but the author presents it as a contested interpretation, not a settled conclusion.
(D) “All historians now accept the revisionist account.” No — the passage says “a revisionist school of thought contends,” implying it is one school among others, not a consensus.
The Difference Between What the Passage Says and What It Implies
Many test-takers struggle with inference questions because they do not distinguish between three levels of textual support:
- Stated explicitly: The passage directly says X. (This is too simple for inference questions but can be useful for elimination.)
- Implied directly: X is a necessary logical consequence of what the passage says. The passage does not state X directly, but X must be true if the passage is true. (This is what inference questions test.)
- Suggested or plausible: X is a reasonable speculation or conjecture that fits the passage but is not logically required. (This is NOT enough for LSAT inference questions.)
The LSAT lives in category 2. You must be able to distinguish a necessary implication from a reasonable speculation.
Techniques for Inference Questions
Paraphrase the Passage’s Logical Flow
Before answering, ask yourself: “What must be true if this passage is true?” Write down or mentally note two or three things that necessarily follow from the passage. Then compare your list to the answer choices.
Use Answer Choice Negation
For Must Be True questions, try negating each answer choice and asking: “If this were false, would the passage still be intact?” If the negation of an answer choice does not damage the passage, then the original answer is not a must-be-true.
Be Wary of Answer Choices with Absolute Language
Words like “always,” “never,” “must,” “certainly,” and “proves” signal that an answer is making a stronger claim than the passage typically supports. LSAT passages are usually carefully qualified — their conclusions tend to be hedged with words like “suggests,” “appears,” “may,” and “often.” Answer choices that mirror this qualified language are more likely to be correct.
Eliminate Answers That Introduce New Information
An inference must be grounded entirely in the passage. If an answer choice mentions a concept, person, or data point that the passage does not discuss, it is almost certainly wrong.
Common Trap: The “Reasonable But Unproven” Answer
This is the most seductive wrong answer pattern on inference questions. The answer choice sounds plausible — it fits what you know about the topic, it feels like a natural extension of the passage. But it is not supported by the passage itself.
The LSAT exploits test-takers’ tendency to choose answers that align with their worldview or prior knowledge rather than answers that are strictly supported by the text. On inference questions, discipline yourself to ask: “Is this answer required by the passage, or merely compatible with it?” If it is only compatible, it is wrong.
Distinguishing Inference from Assumption
An assumption is something the passage relies on but does not state — a hidden premise that bridges the gap between evidence and conclusion. An inference, by contrast, is something that follows from what the passage explicitly says. This distinction matters: you cannot use an unstated assumption to support an inference answer.
Exam Strategy Summary
- Must Be True: Find the answer that must be true; eliminate anything that could be false
- Most Strongly Supported: Find the answer with the best textual support, even if not certain
- Cannot Be True: Find the answer that contradicts the passage; eliminate everything that could be true
- Always return to the passage as your single source of truth
- Trust the logic, not your intuition about what seems likely
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